Hello,

there used to be a "Syberia: The World Before Prologue" (having been removed from the shop meanwhile) , as well as "Syberia: The World Before Demo". Is there a difference between the two? I've downloaded both, but could not yet test them due to compatibility issues (no Windows here).

The "prologue" v1.0 (43455) is 2.8 GiB in size, the "demo" v1.2.1.40425 (56894) is 5.3 GiB in size.
Is this just an older version of the demo, or does it "tell another story" not in the complete game?

As you can see they majory differ by files.
As far as i get it Prologue is advanced version of Demo. It can be my "reflex" though - if somthing digital removed it was better.
Prologue earlier version available at some time before main game release and short time after, replaced to demo. Is there is point in demo if you have (well if you do) full main game version? So maybe there is point in comparing Prologue to main release version?
I dont have full game. Neither the Prologue, but I though i did have it before...
release history game files (for Galaxy only) and updates - Demo version got one update - can be seen on GOGDB.

Better way if you as owner of all (if you have all relases) make a comparison playthrough.